Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-06-04
Phys.Rev.D78:114002,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, 1 figure
Scientific paper
10.1103/PhysRevD.78.114002
We analyze the sigma meson mass and width together with the pion-pion scattering parameters in the context of non-local chiral quark models with wave-function renormalization (WFR). We consider both non-local interactions based on the frequently used exponential form factor, and on fits to the mass and renormalization functions obtained in lattice calculations. In the case of the sigma properties we obtain results which are less dependent on the parameterization than in the standard local NJL model, and which are in reasonable agreement with the recently reported empirical values. We also show that the inclusion of the WFR tend to improve the description of the $\pi-\pi$ scattering parameters, with the lattice inspired parameterization providing the best overall results. Finally, we analyze the connection of the non-local quark models discussed here with Chiral Perturbation Theory, and present the model predictions for the low energy constants relevant for $\pi-\pi$ scattering to O(4) in the chiral expansion.
Noguera Santiago
Scoccola Norberto N.
No associations
LandOfFree
Nonlocal chiral quark models with wavefunction renormalization: sigma properties and π-πscattering parameters does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Nonlocal chiral quark models with wavefunction renormalization: sigma properties and π-πscattering parameters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonlocal chiral quark models with wavefunction renormalization: sigma properties and π-πscattering parameters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-154816